Bigger engine oil cooler

[floyd400]

I've heard the same thing about some synthetic oils, I believe Rotella Synthetic diesel oil is one of them that isn't a true synthetic. One reason why I never cared much for Rotella or ever put it in my truck.

 

[THEFERMANATOR]

I've heard the same thing about some synthetic oils, I believe Rotella Synthetic diesel oil is one of them that isn't a true synthetic. One reason why I never cared much for Rotella or ever put it in my truck.

Yep, ROTELLA T6 is not a true synthetic base stock, but a blended base stock. With that being said, it is the ONLY oil I have used in my DURAMAX that DOESN'T have the typewriter tick. And I was always impressed with how clean the T6 was when drained out. Plus it held better oil pressure than the MOBIL 1 synthetic does.

 

[Will L.]

Yeah the Mobil 1 has two types, Mobil 1 synthetic which is junk, and Mobil 1 extreme performance or extended performance , (something like that) that is really good. If you run it Normal length instead of extending mileage, that does wonders for bearing and ring lifespans.

The rosella t6 only .05% is synthetic, the additive responsible for not plugging up converters. But it also has one of the best cold friction modifiers in it. It way better than regular Mobil 1.

Also found out the last 3 gallons of delo 400 is the last of that stuff I'll buy. It's ild formula used to be great. The new formula that meets uls numbers sucks. Thinking about dumping it in the fuel tank instead of the oil pan.